Synonyms|468Antonyms|98|Broader|6Narrower|0Related|413

202 entries under adjective topic. ×

1
pugnacious(hard, severe, rough, harsh)
1
purposeful
1
refractory(hard, severe, rough, harsh)
1
regularized(dull, steady, stable, regular)
1
reliable(calm, strong, secure, firm)
1
ruffianly(hard, severe, rough, harsh)
1
sacrosanct
1
sempiternal
1
severe
1
solid as rock(expression, idiom, steady, stable)
1
stabile(calm, strong, secure, firm)
1
standardized(dull, steady, stable, regular)
1
stringent(set, hard, stiff, rigid)
1
taut(hard, severe, rough, harsh)
1
terrible(hard, severe, rough, harsh)
1
together(calm, strong, secure, firm)
1
true(strong, firm, determined, serious)
1
unceasing(persistent, constant, continuous, endless)
1
uncompliant(set, hard, stiff, rigid)
1
uncontrollable(hard, severe, rough, harsh)
For more, visit Immutable on Power Thesaurus
11 years ago|10k views|share |citing 
APASmart Define. (2015). immutable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/immutable/thesaurus/synonyms
ChicagoSmart Define. 2015. "immutable thesaurus" https://smartdefine.org/immutable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, immutable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/immutable/thesaurus/synonyms>.
MLASmart Define. "immutable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/immutable/thesaurus/synonyms>